package demo4;

import java.text.spi.NumberFormatProvider;

public class test {
    public static void main(String[] args) {
        //先验证输入参数的个数是否正确
        try {
            if(args.length!=2){
                throw new ArrayIndexOutOfBoundsException("参数个数不对");
            }
            int n1=Integer.parseInt(args[0]);
            int n2=Integer.parseInt(args[1]);

            double res=cal(n1,n2);

            System.out.println("计算结果是"+res);
        } catch (ArrayIndexOutOfBoundsException e) {
            System.out.println(e.getMessage());
        }catch(NumberFormatException e){
            System.out.println("参数的格式不正确，需要输入整数");
        }catch(ArithmeticException e){
            System.out.println("出现了除0异常");
        }
    }

    public static double cal(int n1,int n2){
        return n1/n2;
    }
}
